General
✓✗Maiden hair tree is
- Ginkgo biloba
- Ephedra
- Gnetum
- Welwitschia
General
✓✗In Pinus, the pollen grain has 6 chromosomes. Then its endosperm will have
- 12
- 24
- 6
- 18
General
✓✗What is common in all the three, Funaria, Dryopteris and Ginkgo?
- Independent gametophyte
- Presence of archegonia
- Independent sporophyte
- Well-developed vascular tissues
General
✓✗Turpentine is obtained from
- angiospermous wood
- ferns
- gymnospermous wood
- bryophytes
General
✓✗Ulothrix can be described as a
- non-motile colonial alga lacking zoospores
- filamentous alga with flagellated reproductive stages
- membranous alga producing zoospores
- filamentous alga lacking flagellated reproductive stages
General
✓✗Which among the following is a living fossil gymnosperm?
- Ginkgo biloba
- Pinus roxburghii
- Abies pindrow
- Medullosa noei
General
✓✗The product of conjugation in Spirogyra or fertilisation in Chlamydomonas is
- oospore
- zoospore
- carpospore
- zygospore
General
✓✗The pollen grains and ovules of angiosperms develop in specialised structures called
- strobili
- cones
- flowers
- sori
General
✓✗Arrange the following events of angiosperm reproduction in the correct order.
A. Pollen tube grows through the stigma and style.
B. Pollen grain lands on the stigma.
C. Two male gametes are discharged into the embryo sac.
D. Syngamy and triple fusion.
E. Pollen tube enters the ovule.
Choose the correct answer from the options given below.
A. Pollen tube grows through the stigma and style.
B. Pollen grain lands on the stigma.
C. Two male gametes are discharged into the embryo sac.
D. Syngamy and triple fusion.
E. Pollen tube enters the ovule.
Choose the correct answer from the options given below.
- B, A, C, E, D
- B, A, E, C, D
- B, E, A, C, D
- A, B, E, C, D
General
✓✗In Chlamydomonas, meiosis occurs in
- Zoospore
- Gamete
- Zygote
- Sporogonium
General
✓✗Pinus differs from mango in having
- tree habit
- ovules not enclosed in an ovary
- green leaves
- wood
General
✓✗The system of classification used by Linnaeus was
- artificial system
- asexual system
- natural system
- phylogenetic system
General
✓✗If you are asked to classify the various algae into distinct groups, which of the following characters should you choose?
- Chemical composition of the cell wall
- Structural organisation of the thallus
- Types of pigments present in the cell
- Nature of stored food materials in the cell
General
✓✗In Cycas, the pinnate leaves
- persist for a few years
- are shed every season
- are needle-like
- are absent
General
✓✗One of the following is a pteridophyte.
- Riccia
- Cycas
- Sphagnum
- Azolla